Caldron



H. NEWSHAM.

Domestic Boiler.

Patented Feb. 12..; :1856.

lflilllll'II'IIII'IIIIIIW UNITED STATES PATENT @FFTCE.

HENRY NEWSHAM, OF BALTIMORE, MARYLAND.

CALDRON.

Specification of Letters Patent No. 14,271, dated February 12, 1856.

To all whom it may concern:

Be it known that I, HENRY NEWsI-IAM, of the city and county of Baltimoreand State of Maryland, have invented certain new and useful improvementsin the construction of a portable caldron and furnace combined, formedof one piece of casting,

adapted to agricultural purposes, such as granted, although there wereseveral ad vantages gained, still in the practical application and useof his caldron, there have been disadvantages developed,

improvement in this highly important adjunct to agricultural pursuits Ifeel assured I have overcome them, and upon the value of theimprovements I predicate this application.

One prominent disadvantage in Motts, is the wasteof fuel caused byradiation from the exterior of his flue space. The improvement I havemade to overcome this, is, that by the extension of the sides of mycaldron in connection with the arch form of the bottom (instead of thecup shaped employed) I am enabled to interpose a water space nearlysurrounding the fuel, by which radiation is prevented, and as anevidence of this fact in numerous experiments made with my caldron, thesides thereof have kept cool enough to bear the hand while the watertherein reached boiling heat. Another advantage arising from keeping thesides cool is in relieving the attendants on the caldron when emptyingit of its contents, of the scorching heat by which they have not onlybeen incommoded but their clothes endangered by scorching heat from hisexterior casing. .In economy of fuel I have greatly the advantagearising from the arched form of the bottom, which in fact forms thefurnace itself. By giving the bottom this arched form I am enabled toraise the fuel above the lower portions of the water in the caldron andalso bring the ignited portions in immediate contact with nearly thewhole surface of the bottom.

some of which I w1ll enumerate, lnasmuch as by my This is important whenit is considered that anthracite coal so universally employed ispossessed of slow conducting and radiating properties. Anotherdifficulty in Motts caldron is that its contents must be removed bydipping out or removal of the caldron from the outer casing andoverturning thereof. This I overcome by my mode of constructionadmitting of the use of a large discharge cock at the lowest port-ion ofthe caldron by which it may be emptied. A. further diflicultyexperienced in the use of Motts, is the liability of the sides to crackby the overflow of the contents of the cal dron on the red hot sidesthereof producing the evil by the sudden contraction of the metal. Thisobjection I have completely overcome as fully before set forth.

The expense of all other caldrons and furnaces is increased by thenumber of pieces composing the same, but in my improvement a singlepiece of casting embodies'the caldron and the furnace, themaj or part ofthe latter formed by the arch. This form possesses the advantage overeither a flat or cup shaped bottom of greater strength with less metalemployed, besides the quantity saved by dispensing with an outer caseentirely.

My caldron is not dependent on specific form of furnace, as the archedform of the bottom adapts it the more readily to any form orconstruction; thus instead of using cast iron supports for the gratebars, brick work answers equally as well. Its form also admits of easyremoval when necessary and being in a single casting expense oftransportation is reduced as well as liability to breakage also. Anadvantage not to be overlooked is the manner in which the heat acts onthe water; as the greatest heat is near the center of the arch the waterthere boils up, and then descends by the outer walls or sides of thecaldron, in this way producing a rolling over of the contents thereof.

Figure 1 is a perspective view of the caldron placed on a cast ironstand for the grate bars; Fig. 2, an underside view of the bottom of thecaldron; Fig. 3, a longitudinal and Fig. t a cross section.

The description is as follows: A, the body of the caldron; c 0, sidewalls thereof cast in the same piece with b b, the walls forming an archB of the bottom of the caldron.

e, e, are flanged ribs cast on the flat portom thereof an arched form inthe manner described and for the purposes specified.

In testimony whereof I have hereunto signed my name before twosubscribing Witnesses.

HENRY NEWSHAlW.

Witnesses Y WM. S. CLARK, JOHN S. HoLLINesHEAD.

